Proprietà Elettriche del Particolato Carbonioso Prodotto da Fiamme Laminari Premiscelate Ricche di Combustibile

The aim of the present work is the characterization of particulate matter obtained from premixed flame of ethylene and air, conducted by measuring the values of optical band-gap and the I/V characteristics. The materials in object was collected by thermophoresis, obtaining particulate matter composed both by nanoparticles of organic carbon (NOC), and graphite-like soot particles, with two different ranges of band-gap. Organic nanometric particulate was divided by soot via solvent extraction and was then electrically investigated, showing the presence of a strong hysterisis in the I/V characteristics. A theoretical model based on charges transport between neighbouring particles due to tunnelling effect, typical of non-ohmic granular systems, was used to simulate electrical conduction through a soot particles layer.